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Proceedings Paper

A compact mid-infrared dual-gas CH4/C2H6 sensor using a single interband cascade laser and custom electronics
Author(s): Weilin Ye; Chuantao Zheng; Frank K. Tittel; Nancy P. Sanchez; Aleksander K. Gluszek; Arkadiusz J. Hudzikowski; Minhan Lou; Lei Dong; Robert J. Griffin
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Paper Abstract

A compact mid-infrared (MIR) dual-gas sensor system was demonstrated for simultaneous detection of methane (CH4) and ethane (C2H6) using a single continuous-wave (CW) interband cascade laser (ICL) based on tunable laser absorption spectroscopy (TDLAS) and wavelength modulation spectroscopy (WMS). Ultracompact custom electronics were developed, including a laser current driver, a temperature controller and a lock-in amplifier. These custom electronics reduce the size and weight of the sensor system as compared with a previous version based on commercial electronics. A multipass gas cell with an effective optical length of 54.6 m was employed to enhance the absorption signal. A 3337 nm ICL was capable of targeting a C2H6 absorption line at 2996.88 cm-1 and a CH4 line at 2999.06 cm-1. Dual-gas detection was realized by scanning both the CH4 and C2H6 absorption lines. Based on an Allan deviation analysis, the 1 σ minimum detection limit (MDL) was 17.4 ppbv for CH4 and 2.4 ppbv for C2H6 with an integration time of 4.3 s. TDLAS based sensor measurements for both indoor and outdoor mixing ratios of CH4 and C2H6 were conducted. The reported single ICL based dual-gas sensor system has the advantages of reduced size and cost without influencing the midinfrared sensor detection sensitivity, selectivity and reliability.

Paper Details

Date Published: 27 January 2017
PDF: 7 pages
Proc. SPIE 10111, Quantum Sensing and Nano Electronics and Photonics XIV, 1011134 (27 January 2017); doi: 10.1117/12.2250941
Show Author Affiliations
Weilin Ye, Rice Univ. (United States)
Shantou Univ. (China)
Chuantao Zheng, Rice Univ. (United States)
Jilin Univ. (China)
Frank K. Tittel, Rice Univ. (United States)
Nancy P. Sanchez, Rice Univ. (United States)
Aleksander K. Gluszek, Rice Univ. (United States)
Wroclaw Univ. of Technology (Poland)
Arkadiusz J. Hudzikowski, Rice Univ. (United States)
Wroclaw Univ. of Technology (Poland)
Minhan Lou, Rice Univ. (United States)
Lei Dong, Shanxi Univ. (China)
Robert J. Griffin, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 10111:
Quantum Sensing and Nano Electronics and Photonics XIV
Manijeh Razeghi, Editor(s)

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